TVA to make changes to 4 dams to prevent floods

CHATTANOOGA — The Tennessee Valley Authority on Wednesday announced it will raise the embankments around four dams in the Tennessee Valley by three to four feet before Jan. 1 to avoid "highly unlikely" massive potential floods.

Chuck Bach, general manager of TVA river scheduling, said new information fed into hydrology computer models show the dams could overtop by one to two feet in extremely heavy rainfalls.